Best UK online slot sites & real money slot games 2024


Big Bass Bonanza

5/5

Best in-game bonus slot for 2024

Best UK online casinos for real money slots in September

Rank Casino Bonus Offer Payout Speed Win Rate Play Online
#1 Top Rated Casino
gb flag
0
Bonus
Payout 1-3 days
Win Rate 98.49%
Deposit options include
visa
mastercard
paypal
skrill
neteller
paysafecard
  • Fast withdrawal times
  • Powerful games software from NetEnt
  • Deposit easily with all popular payment types
  • 100% UK Focused
2
gb flag
0
Bonus
Payout 1-3 days
Win Rate 98.13%
Deposit options include
visa
mastercard
paypal
neteller
skrill
paysafecard
  • 100% UK Focused
  • Powerful games software from NetEnt
  • Deposit easily with all popular payment types
3
gb flag
0
Bonus
Payout 2-3 days
Win Rate 96.62%
Deposit options include
visa
mastercard
skrill
neteller
banktransfer
paypal
  • 200% Welcome Bonus up to £400 + 50 Bonus Spins
  • High cash withdrawals
  • Live dealer games
  • Knowledgeable & friendly 24/7 support
4
gb flag
0
Bonus
Payout 1 day
Win Rate 96.80%
5
gb flag
0
Bonus
Payout 1-2 days
Win Rate 97.84%
6
gb flag
0
Bonus
Payout 1-2 days
Win Rate 97.25%
7
gb flag
0
Bonus
Payout 0-2 days
Win Rate 97.76%
8
gb flag
0
Bonus
Payout 1-2 days
Win Rate 96.59%
9
gb flag
0
Bonus
Payout 1-3 days
Win Rate 96.76%
10
gb flag
0
Bonus
Payout 1-2 days
Win Rate 97.16%

UK online slots casinos to avoid

Every now and again, we come across a casino that we recommend you avoid playing on. We have a strict 25-step review process, looking at things like a site’s software, promotions, how easy the banking process is, security and more. When any of these steps fall below our standards, the casino is added to our list of sites to avoid.

Slots to try today- our top picks

At Casino.org, we've got over 15,600+ slots and casino games from the best studios around. Try for free here or play for real money on all of our top recommended online casino sites.

Here are some of our personal favourites to get you started including:

Cleopatra
Play Now
Buffalo King
Play Now
88 Fortunes
Play Now
Siberian Storm
Play Now
PXL_20240513_144116024.MP.jpg

What our expert says

Badge verified
Lewis Crane | Content editor

"Having worked extensively within a top UK operator and testing 1,000+ games from over 30+ of the most recognisable game providers worldwide, you really get an understanding of what makes a slot game special. The UK market is bursting with new games almost daily meaning there's always new bangers on the horizon to slot into your 'must play' list like Big Bass Bonanza, Eye of Horus or Gold Blitz. Do your research and understand what really appeals to you; whether it be juicy jackpots, high RTP titles or a truly exciting bonus round including top mechanics like free spins, Hold & Win or special original bonus games."

The best UK online casinos for real money slots 2024

Need help looking for your perfect online casino? We've done the research and given you a handy list of all of the best casinos based on what you'd be looking for when choosing a casino site.

Check out the table below and get started with the highest number of games, best bonuses and the fastest withdrawals in the UK, selected by yours truly just for you:

Category Our recommendations
Highest number of slots
HeySpin (1,700+ games)
Fastest withdrawal slot casino
Betway (1-2 days)
Highest payout slot casino
Duelz Casino (98.72% average win rate)
Best mobile slots casino (dedicated app)
All British Casino (4.3 & 3.1 on iOS and Android app store)
Best Free Spins casino bonus
Betway (125 Free Spins with no wagering requirements)

Top 10 best online slots

With so many games to choose from, there are always a few titles that really grab your attention. These are the online slots that are the 'certified bangers' of the batch that you should give a shot.

?? Expert insight: "The games selected are the cream-of-the-crop for UK online slots based on their popular theme and exciting mechanics. These are the titles that sit at the top of most UK casinos lobbies and will sometimes make part of their welcome bonus. Big Bass Bonanza is a particular favourite of mine and makes up part of the welcome offers for top casinos like HeySpin and Mr Mega."

Spin today on some of the most popular slots for players in the UK including:

Biss Bass Bonanza - Pragmatic Play (96.71% RTP)

Pragmatic Play's premiere title, Big Bass Bonanza packs the boat with more than a few bass-cinating reasons to play. Featuring up to a 200x max win in the base game, and a whopping 2,100x in the free spins mode, Big Bass Bonanza has cemented itself as a top pick for slots players with 5 of our 10 toplisted slots selecting it as part of their welcome bonus.

Big Bass Bonanza
Play Now

Rich Wilde and the Book of Dead - Play'n Go (96.21% RTP)

Expanding on the established mechanics of Novomatic's Book of Ra, Play'n Go expands the action in Book of Dead. Featuring a boosted RTP of up to 96.21%, the title has a much higher chance of spinning a winner than Novomatic's original 92.13%.

Book of Dead
Play Now

Starburst - NetEnt (96.01% RTP)

Starburst is considered a staple of the UK slot scene - and for good reason! Load the rocket and blast off to an adventure beyond the stars that offers 10 potential paylines to match up to 250x in real cash prizes. The title's Low volatility makes it a favourite as the chance of wins are frequent on every spin.

Starburst
Play Now

The Dog House - Pragmatic Play (96.51% RTP)

Slot fans have been going barking mad for The Dog House due to it's inviting animal theme and whopping 6,750x max win. The High volatility also appeals to players as the chances of hitting big wins on any successful spin is much higher than titles like Starburst or Big Bass Bonanza.

The Dog House
Play Now

King Kong Cash - Blueprint (95.79% RTP)

It's time to go ape with the premiere primate in King Kong Cash from Blueprint. This primate packs a punch with up to a 50,000x max win and up to an impressive 14 unique bonus games to unlock. The Low-Med volatility also means it doesn't take long before a player can record a winning spin; with prizes much juicier than the likes of other Low volatility slots like Da Vinci Diamonds or Butterfly Staxx.

King Kong Cash
Play Now

Gonzo's Quest - NetEnt (95.97% RTP)

Like Starburst, another Netent slot on our top slots 10 list, Gonzo's Quest is a well-established fan favorite in the UK. The 3D graphics of Gonzo and the innovative Avalanche reels feature has cemented the game as a top title for UK players. Gonzo's Quest also features special multipliers in both the base game and free spins meaning you have the chance to unlock additional bonuses right from the first spin.

Gonzo's Quest
Play Now

Sweet Bonanza - Pragmatic Play (96.60% RTP)

Sweet Bonanza offers players plenty to sink their teeth into! The title is an innovator of the popular 'Pay Anywhere' feature where symbols can pay regardless of position on the reels. Sweet Bonanza's Medium volatility also means there's a fair chance to trigger a win on any given spin; with cascading reels on every win for even more chances to match consecutive wins when they trigger.

Sweet Bonanza
Play Now

Money Train 2 - Relax Gaming (98% RTP)

Expanding on the Wild West action of the original, Money Train 2 adds even more to its arsenal by upgrading the total number of bonuses from 5 to a whopping 11 in the bonus game. The title also boasts one of the highest RTPs in the UK market with 98% and coupled with its 50,000x max win; there are chances to bag some big wins.

Money Train 2
Play Now

Rainbow Riches - Light & Wonder (95% RTP)

A favourite of the land casino, Rainbow Riches has cemented itself as an easily recognised slot in the game. The game features 3 highly interactable bonus games that have you rolling dice, spinning wheels or picking pots giving players a bit more than just a set of reels to spin. The Medium volatility also makes the title very accessible as every spin has a decent chance of triggering a win with up to 500x up for grabs.

Rainbow Riches
Play Now

Gold Blitz Extreme - Fortune Factory Studios (96% RTP)

The sequel to the massively popular Gold Blitz, Gold Blitz Extreme takes the solid foundation of the 2022 original and supercharges it with brand new features and a boosted max win of up to 5,500x (500x more than the original). The title retains the High volatility and 96% RTP of the original also, meaning that all of the additional features come without any compromise on what made the original so iconic to players.

Gold Blitz Extreme
Play Now
Game Name RTP(%) Max Win (x) Volatility
Big Bass Bonanza
96.71%
2,100x
Med-High
Book of Dead
96.21%
5,000x
High
Starburst
96.01%
500x
Low
The Dog House
96.51%
6,750x
High
King Kong Cash
95.79%
50,000x
Low-Med
Gonzo's Quest
95.97%
3,750x
Med-High
Sweet Bonanza
96.60%
21,100x
Med-High
Money Train 2
98%
50,000x
High
Rainbow Riches
95%
500x
Medium
Gold Blitz Extreme
96%
5,500x
High

How we rate UK slots sites

Game selection

Naturally, the slot game selection offered is a crucial element in our rating system for UK slot sites. Our benchmark for a slot site to be considered one of the best is 1000+ games to give players the widest possible selection. Sites like Pub Casino and All British Casino house an extensive collection that continues to grow almost daily; so why settle for any less than the best?

Games

Reputation and regulation

Reputation and regulation are vital to how we recommend online casinos. We are always looking for licensing from the United Kingdom Gambling Commission and proof of regulation from eCOGRA to ensure we are only recommending the most legitimate casinos in the market.

Reputation and regulation

Bonuses and promotions

Every online casino has something to offer and we make it a priority to recommend only the best available.

For a slot site, Free Spins are what we look for first and foremost with sites offering on top titles like Big Bass Bonanza.

When it comes to bonus cash amounts, 100% up to £100 is the standard, so we like to see that as a welcome bonus to get the ball rolling - with anything over that being a major plus to any casino.

bonus

Mobile compatibility

Since 2020, over 50% of all casino users are spinning on their favourite titles on the go. Therefore, mobile compatibility sits as of particular importance when it comes to how we evaluate a casino.

While a mobile site is a great start, a mobile app will help a slot casino score highly! The best mobile casinos in the UK like All British Casino offer native app functionality that can further streamline your casino play and get you right into the action in seconds.

casino mobile icona

Customer support

If you ever have any queries or issues at one of our recommended slot sites, they can be resolved quickly and easily by their experienced customer support team who will be on hand to help you out.

All will offer an email support system, with many offering round-the-clock live chat or a telephone number to talk to someone directly. Both of these additional customer support methods go a long way as solidifying a casino as a top choice for UK players as it streamlines the experience and gives options on how to get the best solution for your query.

colour-location

How to play online slots

Slots are the #1 most popular type of online casino game in the UK and it's not hard to see why. Online slots are simple, fun, and can be packed with tons of unique features and bonus games. Whether you're a slots veteran or delving in for the first time, check out our step-by-step guide and you'll be spinning like a pro in no time.

  • 1
    Choose one of the top-rated slots sites in our toplist above and complete their sign-up process (most will come with an extra bonus for new sign-ups like Free Spins or bonus funds to help get you started)
  • 2
    Once signed up, access the "Games" section of the casino
  • 3
    You can filter slots based on game providers, slot type, or theme. Select a game of your choice and wait for it to load up.
  • 4
    Check the paytable options on any game to get an understanding of how to play, the available paylines and all of the exciting bonus features to discover.
  • 5
    Choose your bet level by using the '+' or '-' press spin to begin. Higher bet values do mean higher potential wins, but it makes bigger losses more likely too! Play responsibly and always stay within your means.
  • 6
    Once the reels have finished spinning, wins are calculated with 3 or more matching symbols being a standard for triggering a win.
  • 7
    Some slot games can include bonus base game features that can trigger on any spin including win multipliers, cascading reels or special Wilds that will substitute for any symbol in a win.

Online slot mechanics & features

There are two elements of online slot gameplay, the base game and bonus rounds!

?? Base game

The base game in a slot is where you start whenever you load up an online slot. In this mode, you will attempt to turn your spins into cash by lining up symbols on the slot reels in what is known as "paylines" or "win lines".

Different symbols will have money values with higher-value symbols offering you better payout amounts if you line them up. Paylines and symbols will vary from game to game with some offering more than others.

As well as standard paying symbols, most slots also have special symbols that can add extra surprises to your gameplay. The most common you can find on any spin are "Wilds", "Multipliers" and "Scatter Symbols".

  • "Wilds" can be found on most slot games and can act as any paytable symbol when a win is triggered on the reels. Wilds can also sometimes have cash values of their own and be matched as their own symbol type.
  • "Multipliers" can appear in popular slot titles as part of existing symbols or as their own unique symbol. When matched on a winning spin, Multipliers can add to your total win value by adding a times multiplier to the value. No need to bust out the calculator as you can see your wins doubled, tripled, or even supercharged with up to a 10x win multiplier.
  • "Scatter Symbols" can be found on many slot games and are the key to unlocking special free spins modes or bonus games. Match 3 or more anywhere on the reels and you've punched your ticket to some extra games.

?? Bonus rounds

Bonus rounds come in many forms and generally take the form of a "free spins" round. You will be awarded a number of spins that do not deduct from your cash balance and tick down by 1 each time you spin.

During a free spins round, any number of other special features can trigger to boost your overall winnings during the round. At the end of the free spins round, you will be awarded the total amount won in the free spins round directly into your casino credit.

Titles like Big Bass Bonanza or Immortal Romance further spice up the experience with additional features unique to their free spins mode. Big Bass Bonanza features an exclusive 'Cash Collect' feature that allows for up to 2,000x in instant prizes while Immortal Romance has up to 4 unlockable free spins modes; each with their own set of character-themed bonuses like multipliers and Wild symbols.

During a bonus round, you can activate a number of additional features including:

  • Stacked Wilds- Prominent in titles like Book of Dead and Eye of Horus, some bonus rounds will add Wilds that will stack to turn entire reels Wild; covering multiple paylines for wins.
  • Unlockable Reels- Some bonus rounds will give you even more space to spin with additional reels and expanded paylines for even more chances to win.
  • Random Modifiers- Can be found in a number of titles and will add special enhancers to your spins including random Wilds, win multipliers, giant paytable symbols, extra spins and more.
  • Win Boosters- Games like Enchanted Prince and Sugar Train award an instant multiplier for every win during the free spins mode to help boost your total values.

Other slot game features

The below features can appear either in the base game or the bonus round, depending on the game you are playing. Many online slots will offer some of these features but each game is different and will offer varying features including:

Feature How it works
Cascading Reels
Symbols that disappear when matched in a payline causing the reels to drop down and add even more symbols onto the reels. These new symbols can then cause a medley of winning combinations with each consecutive win adding even more symbols.
Win Multipliers
An element of the game where winnings are multiplied gradually (1x each win) as your number of consecutive symbol matched grows.
Respins
A free new spin that occurs after a paid or bonus spin due to an in-game event, giving you a second chance to win on that spin.
Expanding Wilds
Wilds that extend to cover whole reels when triggered to turn the entire reel Wild and give a higher chance of activating a winning payline.
Exploding Wilds
Wilds that explode when triggered, causing new symbols to appear on reels close to the exploding wild.
PXL_20240513_144116024.MP.jpg

What our experts say

Lewis Crane, Content Editor

"Be mindful that not all slot games offer bonus rounds. Classic slot titles like 7s Deluxe or Burning Wins streamline the experience with just 5 available paylines and no bonus game to keep that retro slot machine feel. Always check the paytable to get an idea of what a game has on offer when it comes to bonus rounds."- Lewis Crane

Types of UK online slots

There are over 28,000+ available online slot games and they all come in different shapes and sizes. Each slot is its own adventure and can differ greatly from game-to-game. Take a look at the varieties below for an introduction to the different types of online slots in the UK.

Classic slots

Three-reel slot games are based on classic fruit machines found in land casinos. This type of slot machine usually features classic symbols like fruit and playing cards. To win, simply line up three matching symbols on a single payline. Three-reel games generally do not include a bonus game and use additional symbols like Wilds very sparingly.

null

Three-reel Classics Slots

Best UK slots bonus

The best slots casinos will offer UK players a welcome bonus for registering. Typically, this bonus will be a percentage of your first deposit. In some cases, bonuses can be from 50-200% with a 100% match bonus being standard in the UK for top casinos like Pub Casino or All British Casino.

Use our calculator to find the best slots bonus for your budget. Some casinos will also offer free spins on top of the bonus. It’s good to hunt around to find the promotion that lets you make the most of your play.

Tip

Look out for online casinos with big sign-up bonuses and low or no wagering requirements to maximise the amount of real money you have available to play with.

Bonus Calculator

Calculate the best bonuses available online.

Casino
Pub Casino
All British
Dream Vegas
Bonus
As some casinos will give the best bonus right on your first deposit, and others might require several deposits to unlock the offer, the casino with the best offer here will change depending on the amount you enter.
100
100
300
Bankroll
Total bankroll figures depend on the way the casinos award their bonuses. A casino might offer the same bonus as another overall, but will require 1, 3 or several deposits to reach the full reward. This is why the same casino can rank differently for different amounts you enter.
200
200
600

UK slots software providers

The online casino scene in the UK is packed with iconic titles from some of the most recognisable software providers worldwide. When it comes to video slots, these guys know their stuff with high production value and a wealth of experience that goes into the creation of every curated online slot game.

??Expert insight: "Remember that not all slots are the same as each provider loves to add their own signature touches to each title. Play a variety and you might start picking up on some of the flavours that separate a Pragmatic Play slot from a Blueprint slot".

Here are some of our favourites to look out that can showcase an outstanding games library at a top online casino:

Blueprint

Blueprint

Hitting the gaming scene in 2001, Blueprint has cemented themselves as one of the UK's top software providers with top performing titles like Fishin' Frenzy, King Kong Cash and Eye of Horus. The provider has also solidified itself in the slots market with its legendary Jackpot King progressive jackpot feature that can see the pot rising to £1,000,000+.

Playtech

Playtech

The world's largest supplier of online games, Playtech has stamped its mark in over 40 regulated jurisdictions and has a presence in over 180 countries worldwide. The provider boasts over 700+ original slot game titles including the legendary Age of the Gods series and a plethora of licensed slot titles based on some of your favourite properties like Superman, Gladiator and The Matrix.

Games Global (Microgaming)

Games Global (Microgaming)

One of the leading gaming providers in the industry, Games Global boast over 1,300+ games from over 40 independent gaming studios. Each studio brings their own unique flavour to the iGaming world including studios such as JustForTheWin, Gameburger, PearFiction and much more.

Pragmatic Play

Pragmatic Play

A relative newcomer in the online gaming scene, Pragmatic Play have wasted no time in becoming one of the most recognisable casino brands in the UK market. Boasting a collection of over 150+ original slots and casino games, the provider has taken the iGaming world by storm with its Big Bass Bonanza series that still regularly appears as part of top casino's welcome offers.

Light & Wonder

Light & Wonder

This Las Vegas-based outfit is one of the oldest software providers in the UK and has more than a few iconic titles under its belt. UK punters need not go far to come across a few recognisable titles from the provider including Spartacus, 88 Fortunes and the iconic Rainbow Riches that now boasts over 25+ original titles in the series alone.

Netent

Netent

A powerhouse in slot game innovation, most of the top 20 UK slots played every year have come from their studio, including classics like Gonzo's Quests and Starburst. In 2020, Netent was merged into the Evolution casino brand to bolster their slots portfolio alongside other studios like Red Tiger and NoLimit City.

Online Slots Technology & Safety

All slots from top software providers utilise RNG technology to guarantee the fairness of every round and this is tested over 1,000,000+ spins before a game is deemed ready to launch. Every game also uses encryption software to ensure the safety of player information and avoid fraudulent activities.

In terms of functionality, a majority of online slots are built with HTML5 to ensure high quality gameplay and compatibility on a majority of modern devices including desktop, mobile and tablet. Most slots also save the results of rounds the second a real money bet occurs so, if you lose the connection to the round, the spin is saved automatically to ensure you can continue your play uninterrupted once a stable connection is restored.

1530+ free slot games

We have a whole host of top-rated free slots that you can play right here. These exclusive free games are available to play instantly, whether at your desk or on your mobile, as there’s no registration or requirement to download an Android or iPhone app. Try your luck and play for free today.

Real money vs. Free Games

Free slots and real money slots both offer an exciting way to play some of your favourite games. Choosing which suits you depends on how you like to play as free slots allow you to hone your skills without risk and real money means you can play for cash prizes. Weight up your options and check out the table below to see how free slots and real money stack up against each other.

Real money slots

Players have the opportunity to win real cash prizes which adds a new element of excitement to gameplay.

Real money players are rewarded with welcome bonuses, free spins and loyalty rewards.

Real money sites offer greater variety of available games including live dealer casino games and exclusive slots.

Players have the opportunity to play for progressive jackpots.

Payouts sometimes won't be received instantly, and will instead take a few days depending on the casino.

Real money gaming can see players lose huge sums of hard-earned cash if they don't play responsibly.

Free Games

Available to play instantly with no app download or sign-up required.

Give players the chance to try games out before spending their money.

Can be played anonymously with no need to divulge personal information or bank details.

Players miss out on the chance to win huge jackpots and other big prizes.

Free play gamers often do not qualify for casino bonuses and loyalty rewards.

Gameplay can become tedious quickly without a real money incentive as all winnings have no value.

Real money slots Free Games

Players have the opportunity to win real cash prizes which adds a new element of excitement to gameplay.

Available to play instantly with no app download or sign-up required.

Real money players are rewarded with welcome bonuses, free spins and loyalty rewards.

Give players the chance to try games out before spending their money.

Real money sites offer greater variety of available games including live dealer casino games and exclusive slots.

Can be played anonymously with no need to divulge personal information or bank details.

Players have the opportunity to play for progressive jackpots.

Players miss out on the chance to win huge jackpots and other big prizes.

Payouts sometimes won't be received instantly, and will instead take a few days depending on the casino.

Free play gamers often do not qualify for casino bonuses and loyalty rewards.

Real money gaming can see players lose huge sums of hard-earned cash if they don't play responsibly.

Gameplay can become tedious quickly without a real money incentive as all winnings have no value.


Best new slots sites UK

New slots sites in the UK are always hitting the market with the latest on-site features and up-to-date technology that can benefit your gameplay in new and exciting ways. At new slot sites, UK players can benefit from innovative gaming and payment software, bigger promotions, and a better selection of the newest and best online slots. Check out our new casinos page for all the latest information on the best new slot sites UK players have access to.


Slots strategy

Online slots are entirely reliant on chance, but that doesn’t mean there aren’t things you can do to put yourself in a better position to win. Experienced players follow a distinct strategy, like only playing games with the highest payout percentages, practising their bonus rounds and knowing their paylines inside and out. Follow these guides to give yourself the best possible chance to win.

What is a payout percentage?

As a slots player, the payout percentage (RTP) indicates how much of your money bet will be paid out in winnings. Every slot and casino game has an RTP percentage that can be found in the paytable with most slots in the UK having an average of 95%-96%+ depending on game and provider.

RTP isn't the only factor determining your payouts as every slot game will also include a volatility level from Low-High. Volatility affects the likelihood of a standard spin being a winner with lower volatility slots winning more often than higher volatility slots.

The tradeoff is that, while low volatility slots pay more often, high volatility slots like Book of Dead award a larger average payout when winning spins are recorded.

We have a page dedicated to casinos with the best payouts so you can find the best places overall for finding games with the highest theoretical win potential.

??Expert insight: "Remember that RTP is calculated on average over 1,000,000+ spins and is a guideline on what you could win. Your personal RTP can be higher or lower depending on how you play as RNG still plays the biggest factor on whether a spin will be a winner."

Check out the table below for a clear understanding of how RTP & volatility can affect your average slots experience including what makes them different.

RTP & Volatility- what's the difference?

RTP (Return to Player) Volatility
RTP indicates the average monetary return a player can expect when playing a slot game over a long period of time.
Volatility indicates the likelihood of a slot triggering a win on any given spin and also has a factor in determining the total win value of each successful spin.
RTP is calculated as a percentage out of 100% with most slot games ranging from 88%-96%+ depending on market and configuration.
Volatility is measured on a scale of Low-High with each slot having 1 of 5 preset volatility levels from Low, Low-High, Medium, Med-High, or High
Higher RTP games are objectively better for your gameplay than lower RTP slots as the chances to win are statistically higher on average.
While volatility has an impact on your playing experience, no specific volatility is objectively better and will depend on what you prioritise as a player between frequent wins and high value wins.
For example: A slot with an RTP of 98% will, on average, return £98 for every £100 spent on bets.
For example: A low volatility slot will have a higher chance of triggering a win on any given spin but the overall payout values will be lower than a high volatility slot.

Top 10 highest RTP slots for 2024 - top payout slots UK

Every online slot has a built-in RTP percentage that is different for each game played. In the UK, 95%+ is seen as the standard for a solid game RTP with titles frequently hitting the 96%+ range to better cater to players.

The following slots offer some of the highest RTP (Return-To-Player) in the UK to help maximise your chances of spinning a winner. Spin on the best RTP online slots including:

Rank Slot Game Developer RTP
1
1429 Uncharted Seas
Thunderkick
98.50%
2
Bloodsuckers
NetEnt
98%
3
Money Train 2
Relax
98%
4
Blood Suckers Megaways
Red Tiger
97.66%
5
Aztec Powernudge
Pragmatic Play
97.57%
6
Sugar Rush 1000
Pragmatic Play
97.50%
7
Wild Swarm
Push Gaming
97.03%
8
9k Yeti
4ThePlayer
97%
9
Fruit Warp
Thunderkick
97%
10
Gorilla Gold Megaways
Blueprint
97%

Best online slot themes

One of the biggest factor that help determine the popularity of an online slot is the wide variety of slot themes available. Whether you're looking to dive below the waves, explore ancient temples in search of Egyptian treasure, or fancy a jaunt over the Irish hills; there's a slot to fit every tastes.

Need a hand getting started? Check out some of the top titles below centred around some of the most popular slot themes in the UK.

PXL_20240513_144116024.MP.jpg

What our expert says

Lewis Crane, Content Editor

"Slot themes have more of an impact for UK players in picking their favourite games than any other factor. From my experiences working within UK operators, fishing and Irish slots are particularly popular with titles like Big Bass Splash and 9 Pots of Gold frequently appearing in an online casino's top 50 best performing games."

Best fishing slots

Fishing games are the undisputed king of the UK slots gaming scene with more than a few worth hooking for your list of faves. Check out some of the most popular fishing slot titles including:

Fishin' Frenzy- Blueprint

One of the first big fishing games to hit the UK slot scene, Fishin' Frenzy was the inspiration for other top fishing titles including Big Bass Bonanza and Wild Wild Bass 2. Check out what makes this title a standout including:

- 50,000x max win

- 96.12% RTP & Low volatility

- Free spins mode with instant cash collect symbols

- 20+ available titles including Megaways and Jackpot King variations

Fishin' Frenzy
Play Now

Big Bass Splash- Pragmatic Play

Fans of Big Bass Bonanza should be right at home in this supercharged version of the original title. Featuring tons of extra bonuses, Big Bass Splash upgrades the Big Bass Bonanza formula including:

- 5,000x max win (2,900x more than Big Bass Bonanza)

- 96.71% RTP & High volatility

- Upgraded free spins mode with additional win modifiers & features

Big Bass Splash
Play Now

Big Fishing Fortune- Inspired Gaming

The fishing action just got bigger with one of the most popular titles from UK casino staple; Inspired Gaming. Check out what makes this Inspired's premiere fishing title including:

- 2,500x max win

- 94.80% RTP & Medium volatility

- Unlimited free spins bonus game

Big Fishing Fortune
Play Now

Best Irish Slots

Irish games are another popular slot theme with plenty of ways to go over the rainbow in search of gold. Some of the earliest slot machine titles are Irish themed and the trend continues in some of the most popular online slots including:

9 Pots of Gold- Games Global

One of the premiere slot titles from Gameburger Studios, 9 Pots of Gold adds plenty of pots to turn into cash prizes. Check out all of the key features that make this a top title including:

- 2,000x max win

- 96.24% RTP & Medium volatility

- 2 bonus games including free spins and Epic Strike instant cash prizes

9 Pots Of Gold
Play Now

Luck O' The Irish Go For Gold- Blueprint

One of Blueprint's most popular Irish slot series, Luck O' The Irish has cemented itself as a player favourite with more sequels than you can shake a rainbow at. Check out what makes this a top title including:

- 2 bonus games including instant prize wheel with up to 2,000x in cash prizes

- 95% RTP & High volatility

- 13+ games in the series including Megaways, Jackpot King and sequels with additional bonus games

Luck O' The Irish Go For Gold
Play Now

Rainbow Riches Megaways- Light & Wonder

Expanding on the mega hit that was Rainbow Riches, Rainbow Riches Megaways boosts the action with a number of new features and ways to win. Check out all of the improvements including:

- 117,649 ways to win (Only 20 in the original)

- 95.90% RTP (95% in the original)

- New free spins mode with an unlimited win multiplier on every win

Rainbow Riches Megaways
Play Now

Best Ancient Egyptian Online Slots

Indiana Jones isn't the only lover of ancient Egyptian treasures as players love stepping back into the tombs of the past. From desert sands to abandoned tombs, to gods and forgotten royalty; Egypt hides many secrets to enjoy. Grab your adventurers hat and check out some of the top titles including:

Eye of Horus - Blueprint

Eye of Horus, and its Megaways counterpart, stand as some of the most popular Egyptian-style slots in the online gaming scene. Featuring up to 20 available paylines and 50,000x your total bet in real cash prizes, there's plenty to enjoy including:

- 96.31% RTP & Medium volatility

- Free spins mode with upgradeable Wild symbols

- Sequels including Megaways and Jackpot King variants

Eye Of Horus
Play Now

Book of Ra Deluxe - Novomatic

Before there was Book of Dead, Book of Ra was innovating the slot game with the special 'Book of' bonus feature. Upgrade the experience in Book of Ra Deluxe with the following improvements including:

- 95.10% RTP (Up from 92.53% for the original)

- 10,035x max win (Up from 5,000x for the original)

- Multiple bonus games including free spins and 50/50 win gamble feature.

Book of Ra Deluxe
Play Now

Cleopatra- IGT

One of the most popular Egyptian titles since its release in 2012, Cleopatra has retained its cult status due to its accessibility and easy gameplay loop. Discover why the queen of Egypt rules the scene including:

- 95.70% RTP & Medium volatility

- Free spins mode with all wins tripled for the duration

- 8+ Cleopatra titles including sequels and progressive jackpot variations

null

Cleopatra
Play Now

Top 6 tips for playing online slots UK

Choose your slot carefully

There are thousands of slots available and no two are exactly alike. Get familiar with the game's mechanics, payouts and bonus features to figure out what works best for you. Don't be afraid to walk away if the game doesn't fit your tastes.

Choose your slot carefully

Consider your bets

Your betting behaviour can have a massive impact on your playing experience. Find the right balance between budgeting to play responsibly and seeking those bigger wins when the time is right. Ensure you always play within your means and only up your bet values when you feel comfortable.

colour-saving-purple

Practice with free games

Playing with free games allows you to test out a variety of games available at top UK slot sites. Playing for free gives you the chance to learn and get comfortable with a game without the risk of losing money.

free games

Take advantage of bonuses and promotions.

Grabbing bonuses and promotions is one of the most lucrative elements available at online slot sites. Take advantage of promotions like no-deposit deals, first-deposit bonuses, or free spins to get the most of your online casino sign-ups.

Take advantage of bonuses and promotions.

Choose a top UK slot site

Choosing the right UK slot site for you will have a substantial impact on your playing experience from your first day and far into the future too. Using our casino reviews can help you with this and using our recommended casinos are guaranteed to provide an impeccable experience for players.

colour-rating

Understand RTP & Volatility

When selecting a game to play, it is important to understand the maths behind the game. Check out the top slot sites to see what high RTP games they offer to maximise your potential winnings when you spin for real money.

[New FE Test] Free spins no deposit

Online slot sites – advantages and disadvantages

Advantages

  • Huge range of games - Slots are the most widely developed games on the market meaning that even smaller-sized slot sites will still offer dozens of games. Games can also differ quite heavily in terms of mechanics, themes and bonus rounds meaning there's something for everyone.
  • Easy gameplay - The gameplay on slots is generally very easy. While some games offer bonus rounds or features that add extra elements, they are easy to get started on.
  • Huge win potential - This is particularly true for progressive slots but even normal slots can offer massive max wins that can pay out huge amounts. Standard titles from Blueprint can offer up to a whopping 50,000x max wins meaning that you don't necessarily need to pop a super progressive jackpot to win big.
  • Low-cost entry-level - Some slots can be played for as little as 1p meaning games are accessible for anyone on any budget.
  • Always new games - New slot games pop up almost daily meaning there is always something new and exciting on the cards.

Disadvantages

  • Strategy is limited - While there is some strategy involved in slots, RNG still has the biggest impact on when a slot game wins or not. Compared to table games like blackjack or roulette, you are limited in how much you can control the results of a round.
  • Low odds - While some slots have higher RTPs, slots generally have very low odds when compared to other casino games like blackjack (99%) or roulette (97%+).
  • Lack of social interaction - Unlike live games where you can interact with other players or the game dealer, slots are a solo experience with no cooperative or social element outside of certain tournaments.

UK slots FAQs

How do online slots work?

The basic concept of slots is to spin the reels and match up the symbols along paylines to win. When you're playing slots online at any of our top online casinos, you can find the instructions on how to play in any game's paytable options.

Can I play slots for free?

Yes. Most online slots sites will offer players the option to play some free slot games. This means you won't have to deposit any money to get started, you can simply enjoy the game for fun. Keep in mind that playing free slots does not allow you to play for real money; meaning any winnings are purely for fun.

What should I look for in an online slot casino?

After security and legitimacy (there are unfortunately a lot of rogue online casinos out there) you want to look at the payout percentage of an online slot. This is the percentage of the wagers paid in that the casino pays out in winnings. This is especially important if you're planning on playing for real money. A higher payout percentage generally means more money back in your pocket.

What’s a progressive jackpot?

This is a jackpot that builds up over time and then pays out a big sum of money to a single player. Most online slots casinos offer progressive jackpot slots so it's worth keeping an eye on the jackpot total and how frequently the game pays out. Progressive jackpots include mechanics like WowPot, Dream Drops and Jackpot King.

Can I win real money playing online slots?

Yes you can. All online casino sites offer a wide selection of real money slots winnings can be withdrawn for real cash prizes. Just make sure you play within your means and understand how factors like RTP can affect the total payout potential.

How do welcome bonuses work?

Welcome bonuses reward players when they make their first real money deposit. The exact terms and requirements vary from casino to casino and some offers that seem too good to be true probably will be. Before you commit your cash, we recommend checking the wagering requirements of the online slots casino you're planning to play at. These will explain how much of your money you're required to deposit upfront, and what you can expect to receive in return.

Are online slots rigged?

No, all regulated online slot machines are completely fair. Slot machines are rigorously tested before being assigned an RTP value to ensure that the results are random on each and every spin. To guarantee fair play, only choose slots from approved online casinos, such as those we list on this page. Playing at any of these will give you a fair chance of winning.

Does the amount I deposit at a slots site influence the payout?

Bigger bets have no affect on the chances of winning but can mean you return more winnings when wins are recorded. Paytable values are calculated based on your bet level meaning that wins at a higher bet level will return more cash. Be mindful to always play within your means and only play at high bet levels if your bankroll allows it.

Do people actually win money with online slots?

Of course. People are winning money on slot machines every single day - with some earning big prizes. Every slot that is properly regulated and on the books of a licensed casino has a chance to award cash prizes on every single spin with some slots having top payouts of over 100,000x depending on the results.

Are there specific UK slot site regulations?

As per UKGC regulations, there are several elements of slots that are banned at UK slot sites. For example, Quick Spin and Auto-Play features, which allow for the game to play with little input from the player, are banned on UK slots. Bonus and feature buys are also prohibited.

Aside from these in-game regulations, players cannot use credit card payments to fund their UK slot site accounts as to avoid players gambling with money they might not have.

will mac.jpg

Written by William Macmaster

Badge verified
Content Editor

William Macmaster is a casino expert who has spent his career connecting players from across the world with unforgettable experiences at safe and reliable online casinos. You can rely on him to provide you with the knowledge you need to get more out of your online gambling experience.

ian-zerafa-author-photo.jpeg

Fact checked by Ian Zerafa

Content Manager

Ian Zerafa grew up in Malta, Europe's online gaming hub and home of top casino regulators and auditors such as eCOGRA and the Malta Gaming Authority. After completing his Master's degree in Glasgow, he returned to Malta and started writing about casinos. He's worked on hundreds of casinos across the US, New Zealand, Canada, and Ireland, and is a go-to authority for Casino.org's team.

References

  • United Kingdom Gambling Commission- The authorities on all gambling-related legislation and laws.
  • eCogra- Focused around casino and gambling regulation and certification.
  • BeGambleAware- For all info on player safety in relation to gambling & gambling addiction.
  • GamCare- Gambling harm support with important info on how to protect vulnerable gamblers and gambling habits.
  • Global Gaming Awards- Independent awards body specialised in online and land-based casino titles.
  • EGR Operator Awards- Awards body highlighting operator's exceptional achievement in player safety and products.